The main configuration type. One of internet, smarthost, satellite, local, exim3manual or none.

dc_hide_mailname

Boolean option that controls whether the local mailname in the headers of outgoing mail should be hidden. (Only effective for smarthost and satellite.

dc_mailname_in_oh

Internal use only Boolean option that is set by the maintainer scripts after adding the contents of /etc/mailname to the dc_other_hostnames list. This is a transition helper since it wouldn't otherwise be possible to see whether that domain name has been removed from dc_other_hostnames on purpose.

ue4c_keepcomments

Boolean option that controls whetherupdate-exim4.confstrips the comments from the target configuration file (default) or leaves them in. This can be overridden by the command line options --keepcomments and --removecomments.

dc_localdelivery

name of the default transport for local mail delivery. Defaults to mail_spool if unset, use maildir_home for delivery to ~/Maildir/. This setting does not correspond to a Debconf question and needs to be set manually.

dc_local_interfaces

Used as the value forExim'smain configuration option local_interfaces.

dc_minimaldns

Boolean option to activate some option to minimize DNS lookups, if set to true a macro DC_minimaldns is defined.

dc_other_hostnames

is used to build the local_domains hostlist, together with localhost. This is the list of domains for which this machine should consider itself the final destination.

dc_readhost

For smarthost and satellite it is possible to hide the local mailname in the headers of outgoing mail and replace it with this value instead, using rewriting.

dc_relay_domains

is used to populate the relay_to_domains domainlist, a list of domains for which we accept mail from anywhere on the Internet but which are not delvered locally, e.g. because this machine serves as secondary MX for these domains.

dc_relay_nets

A list of machines (hostlist) for which we serve as smarthost. Used to populate the relay_from_hosts hostlist. Please note that in the default configuration, 127.0.0.1 and ::::1 are always permitted to relay since /usr/lib/sendmail is available anyway and relay control doesn't make sense here.

dc_smarthost

List of hosts to which all outgoing mail is passed to and that takes care of delivering it. Multiple hosts are colon separated. Each of the hosts is tried, in the order specified (See exim specification, chapter 20.5). All deliveries go out to TCP port 25. Specifying different ports is not (yet) possible due to upstream restrictions. Used as value of the DCsmarthost macro.